in 1998, she was admitted for a clot behind her right knee. she had a stomach virus earlier in month, became dehydrated and passed out, causing the concussion. she cancelled a trip abroad because she was not feeling well. she was not well enough to appear on capitol hill to testify on the september 11th attack on the u.s. consulate in benghazi, libya. she's been treated with anti-coagulants. doctors want to monitor her medication over the next several hours. dierdre bryant, abc news, new york. and to our other major story, the looming fiscal cliff. lawmakers worked through the night to try to reach an agreement. >> without a deal, taxes are set to go up for just about every american. tahman bradley joins us from washington with more on the stalemate. tahman? >> reporter: john and paula, good morning. tension is growing here in washington, after weekend talks failed to lead to a deal. if there is no breakthrough today, the country will go over the cliff.